Across
- 3. barely more than 2 bonds
- 4. low energy
- 6. neutral combination of atoms
- 8. double trouble
- 9. very lonely
- 11. 8 of a kind
- 12. 2 electrons in one orbital
Down
- 1. negatively charged and very tiny
- 2. living on the edge
- 5. formed by a combination of nonmetals
- 7. 2 singers
- 10. its in the title